Endovascular cerebrospinal fluid shunt

Abstract

An endovascular implantable shunt device for draining cerebrospinal fluid from a patient's subarachnoid space includes a shunt having opposed first and second ends, a one-way valve is located at the first end of the shunt, a helical tip is disposed at the second end, and a hollow passageway extends between the helical tip and one-way valve. The helical tip is constructed to penetrate a patient's sinus wall. Cerebrospinal fluid drains through the helical tip and out through the valve.

The invention claimed is: 
     
       1. An endovascular implantable shunt device for draining cerebrospinal fluid from a patient's subarachnoid space to the venous system, the device comprising:
 a shunt having opposed first and second ends; 
 a one-way valve located at the first end of the shunt; 
 a helical tip disposed at the second end, said helical tip being constructed to penetrate a sinus wall of the patient; and 
 a hollow passageway extending between the helical tip and one-way valve such 
 that cerebrospinal fluid can be drained through the helical tip and out through the valve. 
 
     
     
       2. The shunt of  claim 1 , wherein the helical tip includes a plurality of apertures into which the cerebrospinal fluid enters the tip. 
     
     
       3. The shunt of  claim 1 , wherein the shunt includes an antithrombic coating. 
     
     
       4. The shunt of  claim 1 , wherein said helical tip comprises a closed sharpened end. 
     
     
       5. The shunt of  claim 1 , wherein said helical tip defines a helix having constant radius. 
     
     
       6. The shunt of  claim 1 , wherein said first end is tapered. 
     
     
       7. The shunt of  claim 1 , further comprising a projection between said first and second end, wherein said projection extends along a plane perpendicular to a line extending between said first and second ends of said shunt. 
     
     
       8. The shunt of  claim 1 , wherein said one-way valve is oriented to block liquid from flowing from said first end toward said second end and to permit liquid to flow from said second end toward said first end. 
     
     
       9. A system for draining cerebrospinal fluid from a patient's subarachnoid space to the venous system, the system comprising:
 an endovascular implantable shunt having opposed first and second ends, a one-way valve located at the first end of the shunt, and a helical tip disposed at the second end, said helical tip being constructed to penetrate a sinus wall of the patient, wherein the first 
 and second ends are in fluid communication to enable the cerebrospinal fluid to be drained through the helical tip and out through the valve; and 
 a catheter for delivering percutaneously and implanting the shunt into the sinus wall. 
 
     
     
       10. An endovascular implantable shunt device for draining fluid from a patient's subarachnoid space to the venous system, the device comprising:
 a shunt having opposed first and second ends capable of being deployed by an endovascular route through the venous system; 
 a one-way valve located at the first end of the shunt; and 
 a helical tip disposed at the second end, said helical tip being constructed to penetrate tissue of the patient; and 
 a hollow passageway extending between the helical tip and one-way valve such that fluid can be drained through the helical tip and out through the valve.